Hedge trimmer

Abstract

The utility model relates to the technical field of greening trimming, and particularly discloses a hedge trimmer which comprises a cutting saw and an adjusting support, the adjusting support comprises an adjusting seat and a rotating block, a movable groove is formed in one end of the adjusting seat, the rotating block is fixedly connected to the upper end of a saw box, and the end, away from the saw box, of the rotating block is rotationally connected to the inner side of the movable groove. A worm transmission mechanism for controlling the rotating block to rotate is arranged on the outer side of the adjusting base, a positioning disc is arranged on the side, away from the worm transmission mechanism, of the adjusting base, and a self-locking connecting piece for limiting rotation of the positioning disc is arranged on the adjusting base. The cutting angle of the cutting saw is adjusted through the worm transmission mechanism, so that the trimming requirements of hedges in different directions are met. After the rotating block finishes rotating, the self-locking connecting piece on the adjusting seat can limit the rotation of the positioning disc, and the positioning disc is matched with the self-locking property of the worm transmission mechanism, so that when the cutting saw works after being adjusted, the cutting saw can still keep a stable operation state, the rotating block cannot shake, and the safety is better.

Description

Technical Field

[0001] The utility model relates to the technical field of greening pruning, in particular to a hedge trimmer. Background Art

[0002] A hedge trimmer is an outdoor gardening tool used to cut branches and leaves. For example, an ideal arrangement of slender blades with linear reciprocating motion is used to trim hedges or others.

[0003] As the Chinese patent with the application number CN201910618702.9 discloses a hedge trimmer, which includes a drive motor arranged in a housing and a blade arrangement having at least two cutting rods, namely an upper cutting rod and a lower cutting rod. At least one of the upper cutting rod and the lower cutting rod is driven in a reciprocating manner in the longitudinal direction of the blade arrangement by the drive motor. The upper cutting rod and the lower cutting rod are spaced apart from each other by a gap, thereby reducing the friction between them. Usually, when performing such cutting or trimming work, the worker holds the hedge trimmer with both hands and moves the cutting rod along the shape of the hedge. Sometimes, it is necessary to adjust the angle of the trimmer so that the trimmer is vertical to trim the branches and leaves. At this time, the arm will be in a bent state. After being in this state for a long time, the arm will become fatigued, the trimmer will be held unsteadily, and there are potential safety hazards. Summary of the Utility Model

[0004] Aiming at the above problems, the utility model proposes a hedge trimmer to solve the disadvantages that when trimming a hedge with the existing hedge trimmer, it is necessary to adjust the angle of the trimmer so that the trimmer is vertical to trim the branches and leaves. At this time, the arm will be in a bent state. After being in this state for a long time, the arm will become fatigued, the trimmer will be held unsteadily, and there are potential safety hazards.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: A hedge trimmer includes a cutting saw and an adjustment bracket;

[0006] The cutting saw includes a saw box, and a saw blade is arranged at the lower end of the saw box;

[0007] The adjustment bracket includes an adjustment seat and a rotating block. One end of the adjustment seat is provided with a movable groove, the rotating block is fixedly connected to the upper end of the saw box, and the end of the rotating block away from the saw box is rotatably connected to the inner side of the movable groove;

[0008] A worm gear transmission mechanism for controlling the rotation of the rotating block is arranged on the outer side of the adjustment seat. A positioning disk is arranged on the side of the adjustment seat away from the worm gear transmission mechanism. The positioning disk is fixedly connected to the rotating block through a fixed shaft, and a self-locking connecting piece for restricting the rotation of the positioning disk is arranged on the adjustment seat.

[0009] A further improvement lies in that: the worm transmission mechanism includes a rod bracket, a motor, and a worm wheel. The rod bracket is fixedly connected to the outer side wall of the adjusting seat. A worm is provided inside the rod bracket, and both ends of the worm are rotatably connected to the rod bracket. The motor is fixedly connected to the outside of the rod bracket, and the output end of the motor is fixedly connected to the worm. The worm wheel is placed below the worm, and the worm wheel and the worm are fixedly connected to the rotating block through a fixed shaft.

[0010] A further improvement lies in that: the self-locking connecting piece includes a fixed cylinder and a plug pin rod. The fixed cylinder is fixedly connected to the side of the adjusting seat away from the rod bracket. The plug pin rod penetrates through the fixed cylinder and is slidably connected to the plug pin rod. A plurality of pin holes are formed on the outer side of the positioning disk, and each pin hole is evenly arranged in the circumferential direction of the axis of the positioning disk. A magnetic structure for locking the position of the plug pin rod is provided at one end of the plug pin rod away from the positioning disk.

[0011] A further improvement lies in that: the magnetic structure includes a first magnetic block, a second magnetic block, and a third magnetic block. The first magnetic block and the second magnetic block are fixedly connected to the outside of the adjusting seat. The upper end of the first magnetic block is fixedly connected to one end of the plug pin rod away from the positioning disk. The lower end of the first magnetic block is placed between the second magnetic block and the third magnetic block. The first magnetic block and the second magnetic block are attracted to each other. After the plug pin rod is pulled out from the pin hole, the first magnetic block and the third magnetic block are attracted to each other.

[0012] A further improvement lies in that: a pull ring is provided at one end of the plug pin rod away from the positioning disk. The pull ring is fixedly connected to the plug pin rod, and the pull ring is placed on the diameter of the fixed cylinder.

[0013] A further improvement lies in that: a protective cover is provided above the movable groove. The protective cover is sleeved on the outside of the worm transmission mechanism and the positioning disk, and the protective cover is fixedly connected to the upper end of the adjusting seat.

[0014] A further improvement lies in that: a handle is provided at one end of the adjusting seat away from the movable groove. The handle is fixedly connected to the adjusting seat, and a U-shaped handle is provided on the handle. The U-shaped handle is fixedly connected to the handle.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The cutting angle of the cutting saw is adjusted through the worm transmission mechanism to meet the trimming needs of different orientations of the hedge. The arm is bent differently, saving manpower.

[0017] After the rotating block finishes rotating, the self-locking connecting piece on the adjusting seat will limit the rotation of the positioning disk. The positioning disk cooperates with the self-locking property of the worm transmission mechanism, so that when the cutting saw is working after the adjustment is completed, it can still maintain a stable operating state, the rotating block will not shake, and the safety is better. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of the saw blade in the utility model.

[0020] Figure 2 It is a structural diagram of the adjusting seat in the utility model.

[0021] Figure 3 It is a structural diagram of the positioning disk in the utility model.

[0022] Figure 4 It is a structural diagram of the protective cover in the utility model.

[0023] Wherein: 1. Adjusting seat; 2. Handle; 3. U-shaped handle; 4. Saw box; 5. Rotating block; 6. Activity groove; 7. Saw blade; 8. Motor; 9. Rod bracket; 10. Worm; 11. Worm gear; 12. Positioning disk; 13. Pin hole; 15. Plug pin rod; 16. Fixed cylinder; 17. Pull ring; 18. First magnetic attraction block; 19. Second magnetic attraction block; 20. Third magnetic attraction block; 21. Protective cover. Specific embodiments

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0025] According to Figure 1 、 2 As shown in 3 and 4, a hedge trimmer is proposed in this embodiment, including a cutting saw and an adjusting bracket;

[0026] The cutting saw includes a saw box 4, and a saw blade 7 is provided at the lower end of the saw box 4; an activity plate is provided inside the saw blade 7, and the activity plate can move up and down along the inner wall of the saw blade 7. A series of sharp cutting teeth are arranged on both sides of the activity plate. A motor for controlling the reciprocating movement of the cutting teeth is provided inside the saw box 4 to drive the saw blade 7 to rotate, and the cutting teeth on the activity plate saw open the branches and leaves.

[0027] The adjusting bracket includes an adjusting base 1 and a rotating block 5. One end of the adjusting base 1 is provided with a movable slot 6. The rotating block 5 is fixedly connected to the upper end of the saw box 4, and the end of the rotating block 5 away from the saw box 4 is rotatably connected to the inner side of the movable slot 6.

[0028] A worm gear transmission mechanism for controlling the rotation of the rotating block 5 is provided on the outer side of the adjusting base 1. A positioning disk 12 is provided on the side of the adjusting base 1 away from the worm gear transmission mechanism. The positioning disk 12 is fixedly connected to the rotating block 5 through a fixed shaft, and a self-locking connecting piece for restricting the rotation of the positioning disk 12 is provided on the adjusting base 1.

[0029] The worm gear transmission mechanism controls the rotation of the rotating block 5 in the movable slot 6 to adjust the cutting angle of the cutting saw to meet the trimming needs of different orientations of the hedge. Different bends of the arm can save labor.

[0030] After the rotating block 5 finishes rotating, the self-locking connecting piece on the adjusting base 1 will restrict the rotation of the positioning disk 12, further restricting the rotation of the rotating block 5. The positioning disk 12 cooperates with the self-locking property of the worm gear transmission mechanism, so that when the cutting saw is working after the adjustment is completed, it can still maintain a stable operating state, the rotating block 5 will not shake, and the safety is better.

[0031] Regarding the worm gear transmission mechanism:

[0032] The worm gear transmission mechanism includes a rod bracket 9, a motor 8 and a worm wheel 11. The rod bracket 9 is fixedly connected to the outer side wall of the adjusting base 1. A worm 10 is provided inside the rod bracket 9. Both ends of the worm 10 are rotatably connected to the rod bracket 9. The motor 8 is fixedly connected to the outside of the rod bracket 9, and the output end of the motor 8 is fixedly connected to the worm 10. The worm wheel 11 is placed below the worm 10. The worm wheel 11 meshes with the worm 10, and the worm 10 is fixedly connected to the rotating block 5 through a fixed shaft.

[0033] When adjusting the angle between the saw box 4 and the adjusting base 1, start the motor 8. The motor 8 drives the worm 10 to rotate. During the rotation of the worm 10, it meshes with the worm wheel 11, driving the worm wheel 11 to rotate. The worm wheel 11 is fixedly connected to the rotating block 5 through a fixed shaft, and the rotating block 5 is also fixedly connected to the saw box 4. Therefore, the rotating block 5 will also drive the saw box 4 to rotate together. The worm gear transmission has self-locking property. After the worm 10 stops rotating, under the meshing of the threads between the worm 10 and the worm wheel 11, the worm wheel 11 will not rotate back, and the safety is good.

[0034] Regarding the self-locking connecting piece:

[0035] The self-locking connecting piece includes a fixed cylinder 16 and a plug pin rod 15. The fixed cylinder 16 is fixedly connected to the side of the adjusting base 1 away from the rod bracket 9. The plug pin rod 15 penetrates through the fixed cylinder 16 and is slidably connected to the plug pin rod 15. A plurality of pin holes 13 are provided on the outer side of the positioning disk 12, and each pin hole 13 is evenly arranged in the circumferential direction of the axis of the positioning disk 12. A magnetic structure for locking the position of the plug pin rod 15 is provided at the end of the plug pin rod 15 away from the positioning disk 12.

[0036] After the positioning disk 12 stops rotating, the plug rod 15 is pushed. The plug rod 15 slides along the inner side wall of the fixed cylinder 16, and the plug rod 15 is inserted into one of the pin holes 13 on the outer side of the positioning disk 12. Under the limitation of the plug rod 15, the positioning disk 12 will not rotate, and the rotating block 5 is further locked.

[0037] More specifically, the magnetic attraction structure includes a first magnetic attraction block 18, a second magnetic attraction block 19 and a third magnetic attraction block 20. The first magnetic attraction block 18 and the second magnetic attraction block 19 are fixedly connected to the outside of the adjusting seat 1. The upper end of the first magnetic attraction block 18 is fixedly connected to the end of the plug rod 15 away from the positioning disk 12. The lower end of the first magnetic attraction block 18 is placed between the second magnetic attraction block 19 and the third magnetic attraction block 20. The first magnetic attraction block 18 and the second magnetic attraction block 19 are attracted to each other. After the plug rod 15 is pulled out of the pin hole 13, the first magnetic attraction block 18 and the third magnetic attraction block 20 are attracted to each other.

[0038] When the plug rod 15 is inserted into one of the pin holes 13 on the outer side of the positioning disk 12 to limit the rotation of the plug rod 15, the first magnetic attraction block 18 fixed to the other end of the plug rod 15 will be attracted to the second magnetic attraction block 19 to position the plug rod 15. When the plug rod 15 is pulled out of the pin hole 13, the first magnetic attraction block 18 on the plug rod 15 will move closer to the third magnetic attraction block 20. The third magnetic attraction block 20 positions the plug rod 15 in the released limit state by attracting the first magnetic attraction block 18.

[0039] In a preferred solution, in order to facilitate the user to pull the plug rod 15, a pull ring 17 is provided at the end of the plug rod 15 away from the positioning disk 12. The pull ring 17 is fixedly connected to the plug rod 15, and the pull ring 17 is placed in the diameter of the fixed cylinder 16. When the user inserts and removes the plug rod 15, the finger can be used to hold the pull ring 17, and the plug rod 15 will not slip off during insertion and removal.

[0040] In a relatively good implementation manner, a protective cover 21 is provided above the movable groove 6. The protective cover 21 is sleeved on the outside of the worm drive mechanism and the positioning disk 12, and the protective cover 21 is fixedly connected to the upper end of the adjusting seat 1. The protective cover 21 above the movable groove 6 is used to protect the worm drive mechanism and the positioning disk 12. When trimming the hedge, the splashing branches and leaves on the saw blade 7 will not splash to the outside of the worm drive mechanism and the positioning disk 12 under the protection of the protective cover 21, improving the use safety of the worm drive mechanism and the positioning disk 12.

[0041] It is further worth noting that a handle 2 is provided at one end of the adjusting seat 1 away from the movable groove 6. The handle 2 is fixedly connected to the adjusting seat 1, and a U-shaped handle 3 is provided on the handle 2. The U-shaped handle 3 is fixedly connected to the handle 2. The U-shaped handle 3 is used for the user to hold and operate the electric saw. The U-shaped handle 3 is designed with an anti-slip function to improve the use safety. The anti-slip structure is mostly a rubber sheath sleeved on the outside of the U-shaped handle 3.

[0042] Working principle of this application:

[0043] Start the motor 8. The motor 8 drives the worm 10 to rotate. During the rotation of the worm 10, it meshes with the worm gear 11, driving the worm gear 11 to rotate. The worm gear 11 is fixed to the rotating block 5 through a fixed shaft, and the rotating block 5 is also fixed to the saw box 4. Therefore, the rotating block 5 will also drive the saw box 4 to rotate together, adjusting the cutting angle of the cutting saw to meet the trimming needs of different orientations of the hedge. After the positioning disk 12 stops rotating, push the latch rod 15. The latch rod 15 slides along the inner side wall of the fixed cylinder 16 and inserts the latch rod 15 into one of the pin holes 13 on the outer side of the positioning disk 12. Under the limitation of the latch rod 15, the positioning disk 12 will not rotate, further locking the rotating block 5. The positioning disk 12 cooperates with the self-locking property of the worm drive mechanism, so that when the cutting saw works after adjustment, it can still maintain a stable operating state, the rotating block 5 will not shake, and the safety is better.

[0044] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The above are only the specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hedge trimmer, comprising a cutting saw and an adjusting bracket. The cutting saw includes a saw box (4), and a saw blade (7) is provided at the lower end of the saw box (4). It is characterized in that: The adjusting bracket includes an adjusting seat (1) and a rotating block (5). One end of the adjusting seat (1) is provided with a movable groove (6). The rotating block (5) is fixedly connected to the upper end of the saw box (4), and one end of the rotating block (5) away from the saw box (4) is rotatably connected to the inner side of the movable groove (6); A worm gear transmission mechanism for controlling the rotation of the rotating block (5) is provided outside the adjusting seat (1). A positioning disk (12) is provided on one side of the adjusting seat (1) away from the worm gear transmission mechanism. The positioning disk (12) is fixedly connected to the rotating block (5) through a fixed shaft, and a self-locking connecting piece for restricting the rotation of the positioning disk (12) is provided on the adjusting seat (1).

2. The hedge trimmer according to claim 1, characterized in that: The worm gear transmission mechanism includes a rod bracket (9), a motor (8) and a worm wheel (11). The rod bracket (9) is fixedly connected to the outer side wall of the adjusting seat (1). A worm (10) is provided inside the rod bracket (9). Both ends of the worm (10) are rotatably connected to the rod bracket (9). The motor (8) is fixedly connected to the outside of the rod bracket (9). The output end of the motor (8) is fixedly connected to the worm (10). The worm wheel (11) is placed below the worm (10). The worm wheel (11) meshes with the worm (10), and the worm (10) is fixedly connected to the rotating block (5) through a fixed shaft.

3. A hedge trimmer according to claim 2, wherein: The self-locking connecting piece includes a fixed cylinder (16) and a plug pin rod (15). The fixed cylinder (16) is fixedly connected to one side of the adjusting seat (1) away from the rod bracket (9). The plug pin rod (15) penetrates through the fixed cylinder (16) and is slidably connected to the plug pin rod (15). A plurality of pin holes (13) are provided on the outer side of the positioning disk (12). Each of the pin holes (13) is evenly arranged in the circumferential direction of the axis of the positioning disk (12). A magnetic attraction structure for locking the position of the plug pin rod (15) is provided at one end of the plug pin rod (15) away from the positioning disk (12).

4. The hedge trimmer according to claim 3, wherein: The magnetic attraction structure includes a first magnetic attraction block (18), a second magnetic attraction block (19) and a third magnetic attraction block (20). The first magnetic attraction block (18) and the second magnetic attraction block (19) are fixedly connected to the outside of the adjusting seat (1). The upper end of the first magnetic attraction block (18) is fixedly connected to one end of the plug pin rod (15) away from the positioning disk (12). The lower end of the first magnetic attraction block (18) is placed between the second magnetic attraction block (19) and the third magnetic attraction block (20). The first magnetic attraction block (18) is attracted to the second magnetic attraction block (19). After the plug pin rod (15) is pulled out of the pin hole (13), the first magnetic attraction block (18) is attracted to the third magnetic attraction block (20).

5. The hedge trimmer according to claim 3, characterized in that: One end of the bolt rod (15) away from the positioning disc (12) is provided with a pull ring (17), the pull ring (17) is fixedly connected with the bolt rod (15), and the pull ring (17) is placed in the diameter of the fixed cylinder (16).

6. A hedge trimmer according to claim 1, wherein: Above the movable groove (6), there is a protective cover (21). The protective cover (21) is sleeved outside the worm transmission mechanism and the positioning disc (12), and the protective cover (21) is fixedly connected to the upper end of the adjusting seat (1).

7. A hedge trimmer according to claim 1, characterized in that: One end of the adjusting seat (1) away from the movable groove (6) is provided with a handle (2). The handle (2) is fixedly connected with the adjusting seat (1), and a U-shaped handle (3) is arranged on the handle (2). The U-shaped handle (3) is fixedly connected with the handle (2).

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